Table 1

Characteristics of SpA patients and healthy controls

Characteristics

SpA patients (n = 39)

HCs (n = 39)


2006

2010


Mean age, yr

38 (23-49)

42 (27-53)

37 (23-58)

Gender, % females

56

-

64

HLA-B27-positive, %

54

-

ND

Disease duration, mean, years

8 (3-19)

ND

0

Anti-TNF treatment

3

6

Average MRI activity score

SIJ

4.8 (2.0-2.1)

2.5 (0.4-6.3)

ND

Spine

2.0 (0.0-3.3)

1.0 (0.0-2.0)

ND

Average MRI chronicity score

SIJ

12.0 (3.0-27.8)

17.8 (3.0-31.5)

ND

Spine

0.0 (0.0-4.0)

1.0 (0.0-5.5)

ND

CRP (normal <8 mg/L)

1.89 (1.26-3.36)

1.3 (0.5-2.55)

ND

BASDAI

32 (14-53)

28 (15-50)

ND

BASMI

0 (0-40)

0 (0-10)

ND

BASFI

18 (6-33)

14 (8-34)

ND


SpA: spondyloarthritis, HC: healthy control, ND: not done, NT: no treatment, CRP: C-reactive protein, BASDAI: Bath Ankylosing Spondylitis Disease Activity Index, BASMI: Bath Ankylosing Spondylitis Metrology Index, BASFI: Bath Ankylosing Functional Index, MRI: magnetic resonance imaging, SIJ: sacroiliac joint. Data are shown as medians (if not stated otherwise) with interquatile ranges (IQRs).

Carlsen et al. Arthritis Research & Therapy 2013 15:R61   doi:10.1186/ar4234

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